2nd Grade Addition Worksheets (2-Digit, Regrouping)
Free printable second-grade addition worksheets with answer keys — two-digit addition with and without regrouping within 100, plus a facts-to-20 warm-up and three-digit sums. Fresh randomized PDF every time, no signup.
Aligned to CCSS 2.NBT.5 · Add within 100 with regrouping
Practices CCSS 2.NBT.5
Addition — 2-Digit Within 100
Aligned to CCSS 2.NBT.5
Name: ___________________________ Date: _____________
More 2nd Grade Worksheets
Addition with Regrouping Worksheets
Regrouping (carrying) is the heart of second-grade addition: when the ones column reaches 10 or more, students carry a ten into the tens column — like 47 + 38, where 7 + 8 = 15 means writing the 5 and carrying 1. Set the range to 2-digit within 100 with the stacked (column) layout to get vertical problems built for carrying practice, then turn on the answer key to check work. Children still mastering sums to 20 can warm up on our first grade addition worksheets first (CCSS 1.OA.6).
Two-Digit Addition Practice
Not every two-digit problem needs carrying. Sums like 32 + 45 stay under 10 in each column, letting students practice the place-value setup without regrouping before they tackle the harder carries. Click Generate New a few times for a fresh mix of with- and without-regrouping problems, switch to the horizontal layout for mental-math drills, or build number sense with a printable number line. Once addition feels solid, many classrooms move on to fractions worksheets.
How to Teach Second Grade Addition
Build from concrete to abstract: start with base-ten blocks or a ten-frame so carrying is something kids can see, then move to the written column method. Keep sessions short — a dozen problems a few times a week beats one long sheet — and have students estimate first (47 + 38 is “about 50 + 40 = 90”) so wrong answers stand out. Mix in addition facts to 20 for fluency, and only introduce three-digit sums once two-digit regrouping is automatic (CCSS 2.NBT.5 → 2.NBT.7).
FAQ
What addition do 2nd graders learn?
Second grade addition centers on adding within 100 — including two-digit problems that require regrouping (carrying), such as 47 + 38 = 85. This is the core standard CCSS 2.NBT.5. Students also keep building fluency with addition facts within 20 (2.OA.2) and begin adding three-digit numbers within 1,000 (2.NBT.7).
What is regrouping (carrying) in addition?
Regrouping happens when the ones column adds up to 10 or more, so you “carry” a ten into the tens column — for example 47 + 38: 7 + 8 = 15, write the 5 and carry 1 ten. The stacked (column) layout on this generator lines the digits up vertically so children can practice carrying step by step.
Are these worksheets really free?
Yes — every worksheet on Printable Polly is 100% free with no signup, no account, and no download limit. Pick your number range and layout, click Download PDF, and print as many fresh worksheets as you want.
Should I start with 2-digit or 3-digit addition?
Most second graders spend the bulk of the year on two-digit addition within 100, mastering regrouping before moving on. Start with “2-Digit Within 100,” switch to “Facts to 20” for a quick fluency warm-up, and use “3-Digit Within 1000” once two-digit carrying feels automatic.